Hi,
I agree with others that encourage you to provide chairs for all tellers, require they stand when a customer approaches, and monitor for dress code and other professional issues.
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Gayla R. Sherry, SPHR, CMC
President, Gayla R. Sherry Associates, Inc.
Helping organizations improve employee morale, retention and productivity
HR Consulting and Compliance; Training, Conflict Resolution, Internal Investigations, Expert Witness